用克莱姆法则帮忙做个解方程组````谢谢
\u514b\u83b1\u59c6\u6cd5\u5219\u89e3\u65b9\u7a0b\u7ec4x1+x2+2x3+3x4=4 \u2460
X1+x2+x4=4 \u2461
3x1+x2+5x3+10x4=12 \u2462
4x1+5x2+9x3+13x4=18 \u2463
\u89e3\uff1a\u7531\u2460-\u2461\u5f97\uff1a x3=-x4
\u4ee3\u5165\u2462\u540e-\u2461\u5f97\uff1ax1=4-2x4
\u4ee3\u5165\u2461\u5f97\uff1a x2=x4
\u5c06 x3=-x4\uff0c x1=4-2x4 \uff0cx2=x4
\u4ee3\u5165\u2463\u5f97\uff1a x4=2
\u90a3\u4e48\uff1a x3=-x4=-2
x2=x4=2
x1=4-2x4=0
D=|2 2 -5 1|
|1 4 -7 6|
|1 -3 0 -6|
|0 2 -1 2|=25
Dx1=75 Dx2=-100 Dx3=-25 Dx4=25
x1=Dx1/D=3 x2=-4 x3=-1 x4=1
\u514b\u62c9\u9ed8\u6cd5\u5219\u4f60\u5e94\u8be5\u77e5\u9053\u7684\u5427
Dx1\u8fd9\u4e9b\u600e\u4e48\u6765\u7684\u5e94\u8be5\u4e0d\u7528\u8d58\u8ff0\u4e86\u5427
简单,但太麻烦了,不想做啊.去看看克莱姆法则吧,不难.
绛旓細A = 1 2 4 5 1 2 3 -1 1 = -27 A1 = 31 2 4 29 1 2 10 -1 1 = -81 A2 = 1 31 4 5 29
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